Mechanism for flanging the ends of tubes.



110.758.145. BATENTED ABR.26,1904.

- A. 1 NORDENSKJULD.

MEGHANBSM FOR FLANGING THE ENDS OP TUBES.

urucynon FILED 06124 1903. N0 MODEL. 4 sums-8mm 1.

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No. 758,145. I PATENTED APR. 26, 1904.

A. F. NORDENSKJULD.

MECHANISM FOR FLANGING THE ENDS 0F TUBES.

APYLIGATION FILED 00124. 1903.

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No. 758,145. PATENTED APR. 26, 1904.

. A. F. NORDBNSKJULD. MECHANISM FOR FLANGING THE ENDS0F TUBES.

APPLIUATION FILED OUT. 24. 1903.

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* UNITED STATES Patented April 26, 1904.

PATENT- O E.

ANTON FREDR'IK NoRnEiIsKJoLD, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR T rrrrssnno VALVE, FOUNDRY AND CONSTRUCTION COMPANY, or PITTSBURG,PENNSYLVANIA, n CORPORATION or PENNSYLVANIA.

MECHANISM FOR FLANGING THIE ENDS. O'F'TUBES.

SPECIFICATION forming part of Letters Patent No. 758,145,dated April 26, 1904. Application filed (lctober 24,1903. Serial in. 178,355. on modeLl" To 00% whom it may concern;

Be it known that I, ANTON FREDRIK Non- DnNsKJoLn, a citizen of Sweden, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented or discovered new and useful Improvements in. Mechanism for Flanging the Endsof Tubes,

of which the following is a specificationl My invention-relates to mechanism for flanging the ends of metal tubes; and its objects are to provide a mechanism by which I may first heat the portions of the'tubes to be flanged and then gradually bend and stretch the metal without cracking or injuring the same. I preferably use an ordinary'lathe,on which I mount the'tub'e as for lathework, and whose slide-rest I employ as a support and carrier for my bending mechanism, 2 i

Referring to the drawings, Figure '1 is-a" side View of my inv.ention;'Fig. 2, a horizon tal section of the bending mechanism proper, taken through the bending-rolls and the gearing of the carrier therefor; Fig. 3, a section on the line 3 3 of Fig. 2 looking as the arrow flies; Fig. 4, a View, partly in end'elevation and partly in'vertical section, on the line 4 1 of Fig. 2, looking in the direction the arrow as points; Fig. 5, a vertical section showing themanner inwhich I heat the tubes; Fig. 6, ahorizontal section of the tube, together with a fragment in plan of the bending mechanism;

and Fig. 7, a vertical section showing the flanged tubes united. 1

1 represents the bed of a metal-lathe, on

' which is supported the ordinary head-stock 2,

The collars 7 are slid ,up against the flanges 8 of the tubes and are drawn toward each other by the bolts 9, thusclamping the flanges tightly together.

'whicha hood or heating-chamber 11 is sup- Suspended over the lathe isa track 10, on.

ported by means of the carrier 12, having the wheel '13 adapted to'the track 10. The hood ,or chamber 11 is a cylinder of fire-clay or other refractory material and has one end closed by the bottom 14, in which there is a hole 15, through which ametal tube 16 is.

passed; The tube 16 is adjustably supported 'on the carrier 12 by the arm 17 and isconnectf fed to a hose 18, whichsupplies gas for heating thetube 6.v The pipe 16 is provided with a stop-valve 19.' The hole 15 is larger than the tube 16 in order that air may enter the hood to burn the gas. The hood does not fit the'tubeciosely, as shown in Fig. 5, inorder that the products of combustion may escape "and at the same time heat the tube externally.

Within the tube 6 I place a plug 20, of refractory material, to for'm'the inner wall ofthe heating-chamber. After the tube 6 isprop- .erly mounted onthe lathe, as described, the carrier 12 is pushedalong the track 10 until the hood has been pushed over the end of the tube, the collar .7 and the plug 20 having been previously applied, as above described. The

gas is turned on by the valve 19 and ignited. and allowed to burn'u'ntil the end of the tube has become sufiiciently heated for the bending operation. The gas is then turned 011' and the hood withdrawn, and the bending mechan ism proper, now to be described, is employed.

On the top of the slide-rest or carriage 4; I secure in any well-known manner the plate 21, which supports the arc-shaped tracker guide 22, on which slides the arc-shaped carriage 23, pivoted to the plate 21 by the bolt 24. The track 22 has an undercut groove 25, in which a correspondingly-shaped rib or tongue 26 on the carrier 23 fits, whereby the carrier will be held down on the guide in its oscillations on the bolt or pivot 24. The periphery of the arc of the carrier 23 is provided with gear-teeth 27 in mesh with the worm-wheel 28, journaled in the two standards 29, supported on the plate 21. The. worm is operated by the hand-wheel 30. Upon the carrier 23 is a standard 31, which supports the bracket or rest 32 for the rolls 33 and 3a. The roll 33 is fixedly carried by the bracket by means of the pin or journal 35, having one end secured in thebracket. This roller is secured to the pin by a nut 36, countersunk in the outer end of the same, so as to be flush therewith, in order that the end of the roll may engage the side of the tube, as shown in dotted lines in Fig. 6, since a right-angled flange could not be formed otherwise. The roll 3a is journaled on the pin 37 on a block 38, slidable horizontally in the slot 39 in the extension or arm &O of the bracket 32. The carrier 32 has journaled therein the screw 41, which is threaded in the lug t2 on the block 38 and operated by the hand-wheel 43. The

carrier 32 and its arm 40 are in two parts, joined at the line H and secured together by the bolts 45. After the tube'has been properly heated, as already explained, the carriage 4: is moved in the usual manner toward the tube until the rolls have passed sufliciently past theend of the tube to make the flange theiproper height, the roll 34 being within the tube and the roll 33 without. The handwheels 30 and 43 are turned so as to bring the rolls against the sides of the tube. The headstock is then started and the tube continually rotated. The hand-wheel 30 is turned gradually or from time to time, as may be necessary, so as to rotate the carrier 23 toward the wheel 30 until the end of the tube has been bent at the desired angle, as shown by dotted lines on Fig. 6, at which time the rotation of the head stock and the hand wheel 30 is stopped. The roll 34 may, if necessary, be moved away from the flange by the wheel 43 and the roll 33 then moved away from the flange by the wheel 30. The top of the sliderest can then be slid transversely in the usual manner, carrying the rolls away from the tube.

By the words lathe and lathe construc tion used in the description and claims I do not use the same in any specific sense except as including a machine having a lathe-like construction.

In some instances I may find it necessary to heat the pipe during the flanging operation, which may be done in an evident manner.

Having described my invention, I claim- 1. In a tube-fianging machine, means for rotating the tube, a pair of rolls between which the wall of the tube passes during rotation, a pivotally-supported carrier for the rolls, and means for moving the carrier pivotally.

2. In a tube-flanging machine, means for r0- tating the tube, a pair of rolls between which the wall of the tube passes during rotation, a pivotally-supported carrier for the rolls, means for adjusting the space between the rolls, and means for moving the carrier pivotally.

3. In a tube-fianging machine, a lathe construction, including the slide-rest, flangingrollers, and a pivoted carrier for the rollers supported ,on the rest, the rollers capable of forming a flange on the end of the tube as the latter rotates and the carrier turns on its pivot.

4:. In a tube-flanging machine, a lathe con-' struction including the slide-rest, a plate thereon, a track on the plate, a carrier guided on the track, means on the carrier for engaging the tube and bending a flange thereon, and means for moving the carrier on the track.

5. In a tube-flanging machine, a lathe construction including a slide-rest,'an arc-shaped track thereon, a carrier thereon adapted to said track, gear-teeth on the arc' of said carrier, and means cooperating with said teeth to cause said carrier to travel on the track, and means on the carrier for engaging the ends of the tube and flanging the same. 6. In a tube-flanging machine, means for rotating the tube, a pair of rolls between which the wall of the tube passes during rotation, a pivotally supported carrier for the rolls, means for moving the carrier pivotally, and means for heating the tube.

Signed at Pittsburg this 21st day of October, 1903.

ANTON FREDRIK NORDENSKJQLD.

Witnesses:

F. N. BARBER, A. M. STEEN. 

